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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: And now we are back to my premise that high end audio is simply miserably designed!Posted by rowuk on: 2/21/2023
 rowuk wrote:
The whole idea of an earth wire is a path to ground if something fails in the unit. In most countries the (metal) case is attached to this pin on the power connector.
It is incredibly stupid (and in many countries illegal) to lift the earth wire and provide no path for saving your life. That is different than not wanting to use the earth in the power receptacle.
Sure, you are right , 230 volts is very dangrous
I hope it never happen to me, my pre has a connection and I can connect it to the earth.In remember old audio products from japan had no earth wire.Now all audio equipments have safety earth connection but some of them like FM have break switch at back of amplifier if i am not mistaken.This switch disconnect/connect the earth connection. FM wrote about it
https://amiraudio.com/wp-content/uploads/2023/02/TB_05-R2.pdf

If the power supply and case are correctly wired and grounded, we have no ground loop issue. If one device is designed badly, the whole chain can have issues. That does not make grounding bad - it makes the terribly designed devices dangerous. Electricity  from the grid is carried by a hot wire and a neutral wire. The case around an audio product should NEVER be connected to hot or neutral. We should have cases around our gear capable of shielding the circuits from RF. A real ground will provide a path for any stray interference away from the audio signal.

I also insist that audio devices that are "extremely" sensitive to "bad electricity" are simply badly designed. This is where we have proof that the equipment designers are not considering the use cases where the devices will be used. The engineering capabilities are there. We have so many use cases in manufacturing and medicine where proper isolation is critical

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